Record-resurfacing machine



Al1g- 6, 1929 J. M, LUCARELLE ET AL. 1,723,569

` RECORD RESURFACING MACHINE Filed April 27, 1927 3 Sheets-Sheet l lg Ha 'w V n l Y 1 i l :e "u" l y l ummm l M :1 Mii' a 1. r 121// l* (e 1 I ug 6, 1929- J. M. LUCARELLE ET AL 1,723,569

RECORD RESURFACING MACHINE Filed April 27, 1927 5 Sheets-Sheet IN V EN TOR. J; M, L LLCALY'ELz/e TTORNEY llg 6, 1929- J. M. LUCARELLE ET AL 1,723,569

RECORD RESURFACING MACHINE Filed April 27, 1927 5 Sheets-Sheet 1N VEN TOR.

` JM Llcamelle By YL. Fryk man A TTORNEY Patented Aug. 6, 1929.

UNITED STATES PATENT OFFICE. i

JOSEPH M. LUGAR-ELLE AND VICTOR L. FRYKMAN, OF BRIDGEPORT, CONNECTICUT, AS- SIGNORS TO DICTAPHONE CORPORATION, OF BRIDGEPORT, CONNECTICUT, A COR- PORATION OF NEW YORK.

RECORD-RESURFACING MACHINE.

Application filed April 27, 19272 This invention relates to record-resurfacing machines, and more particularly to an `improved machine lier shaving recordblanks, particularly those intended for use with dictation machines.

An object ot the present invention is to provide means for facilitating the. setting et the record-engaging tool-a knife, for instance.

Another object ot the present invention is to prei/'ide means 'for automatically advancing the knife to take a second or finishing cut after the irst or rough cut has been taken.

And a still further object ot the present invention is to provide means tor automatically releasing the knife trom set position when the shaved record is to be removed from the machine. V

An important feature et the present invention, which will appear more fully in the specific description ot the machine shown in the accompanying drawings, is the provision ot means tor gauging the depth ot cut, which means is so arranged that it is not .liable to damage the linished surface et the record.

Janother important feature is the provision ot means for automatically advancing 'the knife a predetermined amount when the knife carriage is moved to return it to position to start shaving a record.

Another important feature ot the present invention is the provision et means for returning the knife to normal unset position when a gate for holding the record mandrel shatt in operative position is opened preparatory to the removal of the record trom the mandrel.

Other features and advantages will hereinafter appear.

In the accompanying drawings which illustrate one i'orin of the invention, that at present prete.rred- Figure 1 is a top plan view ot a record shaving machine mzule in accordance with the present invention, the record shaving' knife being` in the position it usually assumes before the knife-bar carriage is moved to position to start the cutting of a. record.

Fig. 2 is a side view ot the operating parts of the present invention, showing the frame and part et the knife-bar carriage in section.

Fig'. 3 is a rear view ot the knife-bar car- Serial N'o. 187,094.

riage, showing the means for adjusting the knife for a second or finishing cut and the means for releasing the knife-bar at the proper time.

Fig. 4 is a View oi` part oi the knife-bai.' carriage, showing the means for automatically releasing the knife-bar `from set position.

Fig. 5 is a sectional view taken through the line 5--5 ot Fig. 2, and showing the operating parts of the present invention.

Fig. G a sectional view through the knife-bar carriage taken on the line 6--6 ot Fig. et, and showing the means `tor locking the knite-bar in adjusted position.

Fig. 7 a detail view showing the operative connection between the end gate tor holding the mandrel shaft and the means for releasing the knife-bar from set position when the end gate is open. i

The shaving machine shown in the accompanying drawings yie particularly adapted ior shaving or otherwise resurfacing phonograph record blanks, particularly i those adapted to be used with dictation machines. It comprises a frame base 10 provided with a lett-hand standard 11 and riggjht-lunid standards 1Q and 13. Supported between the standards 11 and 12 is a guide-rod 1l adapted to receive a bearing sleeve 15 ot a knife-bar carriage 1 6, whose forvmrd end is rovided with a shoe 17 adapted to ride on a rail 18 forming part et the :traine 1t). rllhe knife-bar carriagelG extends torwai liv and upwardly from the sleeve 15 to a point above the rail 18 where it is provided with a ball-shaped weight and hand-piece 19 and from the latter it continues downwardly to the shoe portion 17.

Located in Yfront of the guide-rod 14 and bearing at one end on a pivot screw i2() carried by the standard l1., is a mandrel shaft 2l carrying a driving pulley 22 and a inandrel 23. At its end opp( Ae the pulley the mandrel shaft 21 is supported by a pivot screw 241; carried by a gate 25 secured to ay shaft or stud QG rotatably mounted in the frame l() at 27. The gate 25 is .locked in operative position, firmly engaging the standard 13, by a manually releasable springcatch 2S and is provided at its iront end with. a finger-piece 29 by means of which it operated. Then the gate Q5 is opened,

CII

the mandrel shaft rests on a lug 3() on the frame 10, and free movement of the mandrel and mandrel shaft to the right, as viewed in Fig. 1, is prevented by a collar 31 car-- ried by the mandrel shaft.

After a record 32 is placed on themandrel 23 as shown in Fig. 1, the operator grasps the handle 29 and swings tie gate on its shaft 26 until the gate engages the standard 13, at which time,- the pivot screw 2li enters a companion hole in the end of the mandrel shaft 21 and raises the mandrel shaft to operating position. The spring-catch 2S is then moved to locking position by means of a finger-piece 33 provided thereon.

Vith the record mounted on the mandrel and the gate closed as above described, the record is in position to be shaved as the result of the movement of the knife-bar carriage 16 longitudinally of the record under the influence of a feed-screw 34 mounted between standard 35 and standard 11 and engaged by a feed nut carried by a spring-arm 36 mounted on the sleeve 15 of the knife-bar carriage 16. The feed-screiv7 34 is caused to operate coordinately with the mandrel shaft 21Vby means of a connecting belt 37 engaging a pulley 38 on the feedscreW shaft 34 and a pulley 39 carried by the mandrel 21 alongside of the pulley 22. The pulley 22 is driven from a suitable source of power, such as an electric motor not shown, Vby means of a belt 40 engaged thereon.

The above described structure and mechanismV are common to record-resinfacing niachines heretofore manufactured and used, and form a partof the present invention only in so far as they are related to or cembined with other mechanism hereinafter described.

vPhonograph record blanks are customarily shaved to resurface them for use when it is desired to obliterate a record preparatory to producing a new rec rd on tl'ie irface of vthe blank. But, this operation may also be accomplished by means of burnishing tools and other arrangements. In so far some of the salient features of 'the present invention are concerned, it is immaterial Whether the record-engaging tool is a knife or a burnisher or other device. However, since the method of cutting is the one most frequently used and the most preferable at present, it is illustrated herein.

The device illustrated herein has a knifebar 41 adapted to carry at its end a knife A12 usually made of sapphire or other hard stone, This knife-bar 41 is, as usual, slidably mounted in a housing 43 forming part of the knife-bar carriage 15 and is adapted to be moved so as to bring the knife 42 into contact with the record surface so-that rotation of the record and travel of the knife With the knife-bar carriage 16 causes the top surface of the record to be removed. The

knife .is preferably provided with a chipchute l1 into which the shavings from tho record pass when removed `from the recordsurface and through which they fall downwardly through an opening L15 in the frame 10 to a suitablecontainer, (not shown) provided for the purpose.

In order that the knife may be quickly and easily set to proper operating position when taking the i'irst or rough cut in re surfacing a record blank, the present invention provides means whereby the direct manual operation causes the knife-bar to be set in such position that the knife will cxtend into the record-surface a predctcriniticd extent, so that when the mandrel is rot ated there is removed from the record-surface a layer of a predetermined thickness. 'lhis means, according to the present invention, comprises a gaugebar 4G mounted in the housing 4,3 to slide parallel with the knifebar 41 and a yoke or tio-bar /l-.T connecting the gauge-bar 4G with the knife-bar All for movement en bloc toward and frein thc rocorcfsurfaee. The knife-lair ell and the gaugebar 1G are so interconnected a .l formed that the working surface of the knife 42 extends beyond the working sur face 4S of the gauge-bar 11G by an anicnnt equal to the depth of cnt which it is intended to take with the machine, for cxample, iifteen tcn-thousamilths of :n inch. Thus, when the knife-bar l1 and gang-re lt are moved toward the record by the operator pressing his finger against the button 19 carried by the raugcebar A'1G until the working surface 1S of the gauge-bar engages the record-surface, the knife 42 will bc in position to tale a cut of predcterinined depth from the record blank.

rllhe gauge-bar 46 may, of course, be located at either side of the knifcdmr al1 depending upon what point in the operation of the niacliine ily is desired to set tl o knife-bar. However, according to the prcscnt invention, the gauge-bar is e t behind the knife-bar, considering the direction of travel of the c rriage, so that the gage-bar is :ilways above and spaced from the recordsurface while the knife is shaving,r and docs not contact with the finished record-surface. The knife set relative to the record for the initial cut when the carriage is in the tinish position of cutting travel at the left side of the machine as shown in Fig. 1. lith the carriage in this position, the operator pushes the gage-bar for vardly toward the record until the gage-bar engages the record and the interconnected l fo which is `slightly ahead of the gage-bar and is positioned and locked as shown in Fig. 1, but docs not diginto the record-surface because it is beyond the end of the record. After this conditioning, the carriage is lifted and then moved to the starting position of travel at the righi'` side of the machine after which the carriage regularly advances over the reomd-sm'face and the knife takes a cut of predetermined depth while the trailing; gagebar clears the record-surface an amount equivalent to the depth o' cut. The amount. of space between the gauge-bar and the record-surface depends upon the depth ot eut. In the caso cited, there will be a iitteen ten-thousandths clearance or more between the gaugesbar and the 1'oc n'd-su1t`ace when the gauge-bar is, as shown in the drawings, caused to trail the imite-bar. This a particularly iniiportant feature ot the present invention, tor, by having` the gaugebar trail the knife-bar, the gauge-bar is not in Contact with the record, and therefore will nottransnfiit to the knifebar irregularities or eccentricities which the record may have. Moreover, by havinpr the gauge-bar trail the imite-bar, it can be located in a position to engage the end of a record-blank `when the knife-bar carriage lo is in the position it occupies when the last record-blank was shaved-namely to the left as shown in Fig'. l, in which position the feed-nut has lei't the threaded portion of the screw-shaft 34 and over a cutaway portion 34 thereon. Then the carriage in this position and the gauge-bar 4G is placed behind the lmiiebar, the =lange-bar may be spaced suiiiciently trom the .imitebar longitudinally ot the record-blank so that the gauge-bai.' will be in position to contact with the end ot a record-blank While the knife-oar is beyond the end of the record-blanlr, Hence, the knife-bar gauge may be moved to position by hand as described Without pre. "ing or torcing,` the knife 42 into the record-surface. Preferably, the working surtir@ 48 of the gauge-bar 46 is made so large that the torce with which it engages the surface ot the record-blank is not f-iuiiicicnt to cause the recordfbhink to be indented by the ajauuebaiz However, it a slight indentation does occur in particularly Warm v-.feather or ifi an almormally largo amount oi' force used in setting;l the knifebar, .it will not result in demeure being,l done to the Atinirfihed record-surtace, but will inereiycause the knife-bar to be set slightly deeper, any imlentations produced being` removed by the shai 'a' operation.

As ,only best be seen in Fins. 5, G and 4, the imite-bar 4l is locked in the position determined by Contact ot the gauge 4G Awith the record by means oit a clampiim,` arm 50 mounted on a screw l supported by the houfrfgr and normally forced upwardly to posi ,n to engage a flattened sur-tace 52 on the knife-bal.' by means ot a spring;l 53 secured to the housingl by a screw The spriim 53 is made strongl enmigh so t iat the clamliiinp1 arm 50 will bear against the 'imitebar 4l and :torce the same against a sleeve mounted in the housing,l 43 to hold the knitefbar and the sleeve against movement in the housinp,` except when the sl l.eve itscltis moved as will hereinafter appear.

In order to release the clamping' arm 50 when itis desired to adjust the knife-bar to position to tahe the irst or rough out, it is provided with a releasing lever 5G, (Figs. 3, 4 and G) pivoted on a screw 57 mounted. inthe housing 43, and this lever provided with a cam surface 58 adapted to engage the end 59 of the clanipinp,` arm 50 and depress the same to niove it away trom the knitebar 4l `when the lever is moved tormu'dly in the direction oi. the arrow shown in Fie. 4.

Thus, to set the lrnite 4&2 in position to take a. predotermined out from the recordsurtace, the releasingl lever 56 is iirst pulled forwardly and then the linger-piece 4t) on the njaf|-ijbar 46 is pushed forwardly to cause the working;n surface 4S to engage the record and then the releasingr lever 5G is returned to locking' position shown in Fig". 4.

As stated above, the present invention provide-.sl means ior automatically advancing the imite-#bar and knife to take a second.

or fin up; cut as an incident to the movement ot the hnite-bar carriage to pos. ion

to take that cut. This means, accordingr to the einbofjliinent ol the invention herein disclosed, comprises an :n'rangement for moving the sleeve 55 (which as stated is interposed between the knife-bar 4l and the housing` 43) a predetern'iined amount each time that the knitebar carriage l5 is .anvunggupwardly and rearwardly from the position shown :in Fig. l, which movement it is neces sary 'to give to the carriage l5 so to release the toed-init from the feedscreiv and thereby permit the carriage l5 to be returned to the right/to start shaving` the record. The movement: of the sleeve is acconnilished by the )rcsent invention by cooiiieratimr cam surfaces G() and Gl (see 5)., thc former being` provided on the sleeve 55 and the latter beingl provided on a disk 62 mounted to rotate on the end of the knife-bar 4l. As may best be seen in Fig. 3, the disk G2 is provided with a segment 63 having ratchet teeth G4 thereon adapted to be engaged by a pawl G5 carried by an arm GG pivotally nu'nlnted'on a screw (57 secured in the housing' 43, a sprinfbfl 'Si being,l connected to the paivl G5 so as to hold the pawl and its operatingl arm GG normally in inoperative position. Then the pawl arm 6G is raised from the position shown in .l i; g;. 3, the pavvl 65 is forced against the ratchet teeth 64 of the segment 63 to turn the segment (S3 one step. This causes the cam (il to rota-te and force thesleevo 55 'forwardly in the housingl 43 an amount sutiicient to advance the knife to take a finishimil or second out.

The movement ot the kniiebar 41 :For-

wardly with the sleeve 55 is possible, because the clamping arm which engages it and the knife-bar may also move forwardly with the sleeve, the clamping arm bearing surface 69 on the screw being long enough ,to permit the clamping arm 50 to slide forwardly on it against the tension of a. spring 70 interposed between the head of the screw 5l and the clamping lever 50. During this movement, the clamping arm 50 still maintains the knife-bar 41 clamped in the desired adjusted position with relation to the sleeve. Since the sleeve has a cut-away portion 70a embracing the arm 50 and the arm 50 is normally urged backwardly by the spring 70, this spring also keeps the cam surface on the sleeve 55 firmly pressed against the cam surface 61 on the collar 62 and returns the same to its rearmost position when such action is otherwise permitted. i

Occasionally, the second and so-called finishing cut is not suicient to entirely remove the grooves produced on the record by the last recording operation, and hence it is desirable to take one or more extra finishing cuts. In order to permit this to be done without requiring a readjustment of the setting of the knife by operating the releasing lever 56 and resetting the knife and the gauge 46, the segment 63 is provided with enough teeth 64, and the cam surfaces 6() and 61 are shaped to accommodate the largest number of secondary cuts, (five in the case shown) that the machine would ever be required to make.

In order that the machine may always be in position to take a finishing cut, the segment 63 and its cam 62 are returned to normal position, shown in Fig. 5, each time the release lever 56 is operated to release the clamping arm 5() and allow the knife-bar 4l and gauge-bar 46 to be returned to normal position by' a spring 71, see Fig. 5. As may be seen in Figs. 4 and 3, this is accomplished by providing a link 72 connected to the releasing lever' 56 at 73 with a rearwardly extending arm 74 located in position to engage an arm 75 carried by the segment 63 on the side opposite that having the teeth 64. When the releasing lever 56 is swung forwardly,.the arm 74 thereon engages the arm 75 on the segment 63 and moves the same upwardly, the arm 74 thereon engages the arm 75 on the segment 63 and moves the same upwardly until further movement is arrested by the engagement of the arm 75 with the rear end of the gauge-bar 46.

Attention is here called to the fact that any backward thrust produced by the record on the knife-bar 41 or gauge 4S is absorbed by a plate 76 (see Figs. 3, 4 and 5) which is secured to the housing 43 by screws 77. The cam disk 62, which takes the backward thrust through the sleeve 55, bears against the plate 76 through the intermediary of a washer 62 interposed between the disk 62 and the plate. The knife-bar is advanced,

as above described, automatically each time the carriage is raised to return it while in the position shown in Fig. 1 by means of a plunger 78 whose upper end engages a pawl arm 66 and whose lower end is adapted to lie in a socket 79 provided in the guide rail 14 (as shown in Fig. 3). lVhen the carriage 15 is in a position where the plunger 7S lies in the socket 79 and the carriage 15 is swung upwardly and rear vardly by the operator grasping the handle 19, the plunger 7S rides up on a cam surface 8O of the socket 79 and causes the pawl arm 76 to be raised and the pawl to advance the segment 63 an extent equal to the length of one tooth. lhile the carriage in this elevated position, it is moved longitudinally of the record to bring it to the right-hand side of the machine as viewed in Fig. 1, whereupon it let down to bring the knife 42 into position to engage the record-surface. During this return n'ioveinent and subsequent traveling movement of the carriage 15, the plunger 7S is maintained elevated because it rides on the cylincrical surface of the guide rod 14.

When, however, the end of the cutting operation is approached, the plunger 7S dropsl into the socket 79 and is then in position to cause the pawl 65 to advance the segment 63 one tooth when it is again raised lo return it for another finishing cut, if such is found to be necessary.

It will be seen from the above that the setting of vthe knife 4Q is controlled not only by the gauge-bar 46 but also by the cooperating cam surfaces 60 and 6l, the latter being controlled by the segment 68, and it will also be noted in the construction described that even immediately after the knife-bar is set by hand to determine the depth of cut by means of the gauge 46, it advanced an amount equal to a seconda ry eut by the segment 63 when the carriage is raised to return it to position to start shaving the reeord. This advance of the knife which is desired for secondary cut is taken into consideration and compensated for by nnikingr the gauge-bar 46 that much longer. For instance, if it is desired to take a rough or first cut of twenty thousandths of an inch, and the secondary adjusting means comprising the cams 60 and 61 and the segment are set to advance thc knife-bar five thousandths of an inc-h for each increment movement of the cam 61 by the ratchet paw] 65,

the knife 42 is set only fifteen thousandths f of an inch in advance of the workingr face 48 of the gauge-bar 46. Hence, when it is first set by hand, the knife will be in a position to remove a layer of record material fifteen thousandths of an inch thick. How

lill

mined operative position to position to take a linishing out of predetermined depth.

6. In a reeordresurfaeing machine; the combination of means for supporting a record to be resurfaced; a record-engaging tool; means for setting the tool in operative position with relation to a record; and means operative automatically as an incident to the operation of removing the record :trom the machine for returning the set tool to inoperative position.

7. In a record-resurfacing machine, the combination ot' a mandrel for supporting a record to be resurfaced; a record-engaging tool; means for setting the tool in operative position with relation to a record supported by a mandrel; al lever operated as an ineident to the removal of the record from the mandrel; and means controlled by said lever for returning the set tool to inoperative position.

8. In a record-resurfacing machine, the combination of a mandrel for supporting a record to be resurfaced; a record-engaging tool; means for setting the tool in operative position with relation to a record supported by a mandrel; an end gate for the mandrel adapted to be moved to permit the record to be removed from the mandrel; and means controlled by movement of the end gate for returning the set tool to inoperative position.

9. In a record-resurfacing machine, the combination of a mandrel for supporting a record to be resurfaeed; a record-engaging tool; means for setting the tool in operativ position with relation to a record supported by a mandrel comprising a lock; means for returning the tool to inoperative position with relation to the record when said lock is released; and means operated as an incident to the operation of removing the record from the mandrel for releasing said lock to canse the return of the tool to inoperative position.

10. In a record-resurfacing machine, the combination of a mandrel for supporting a record to be resurfaced; a record-@gagging tool; means for setting the tool in operative position with relation to a record supported by the mandrel comprising a lock; means Jfor returning the tool to inoperative position with relation to a record when said lock is released; an end gate for said mandrel adapted to be swung to inoperative position n to permit removal of the record from the drel; and means operative when the carriage is in a predetermined position and as an incident to the operation of removing the reeord from the mandrel for returning the set tool to inoperative position.

12. In a reeordresurtacing machine; the combination of a mandrel for supporting a record to be resurfaced; a carriage; a ret-ordengaging tool on the carriage; means for setting the tool in operative position with relation to a record supported by the mandrel; an end gate for the mandrel adapted to be moved to inoperative position to permit the removal of the record from the mandrel; and means operative when the carriage is in predeterniined position and as a. result of the movement of the end gate to inol lrative position for returning the set tool to inoperative position with relation to the record.

18. In a record-resurfacing machine, the combination of a mandrel for supporting a record to be resurfaced; a carriage; a` recordengaging tool on the carriage; means for setting the tool in operative position with relation to a record supported by the mandrel comprising a lock; means for returning the tool to inoperative position when said lock is released; an end gate for the mandrel adapted to be moved to inoperative position to permit the removal oit the record from the mandrel; a lever system operated by said end gate when moved to inoperative position comprising means adapted to be located within range of the carriage when the carriage is in a predetermined position longitudinally of the record; and an interponent between the last-named means and the said lock operative to cause the lock to be released when said linking system is operated as a result of movement of the end gate to inoperative position. Y

14. In a record-resurfaeing n'iaehine, the combination of a mandrel for supportingr a record to be resurfaeed; a carriage; a recordengaging tool movably mounted on the cai riage toward and from a record; a gauge movably mounted on the carriage to predetermine the operative position of the recordengaging tool with relation to the record; said gauge being carried by the carriage at one side of the record-engaging tool and being adapted to engage the record-surface when moved to operative position; and means securing the gauge to the record-engaging tool in predetermined fixed relation for simultaneous movement on the carriage toward and from the record.

15. In a record-resurfacing machine, the combination of a mandrel for supporting a record to be resurfaced; a carriage; a knife; a knife-bar slidably mounted on the carriage for movement toward and from a record; a gauge-bar movably mounted on the carriage to predetermine the operative position of the knife and knife-bar with relation to the recltlfi ord, said gauge-har being carried by the carriage at one side of the knife-bar and be ing adapted to engage the record-surface when moved to operative position; and a tie-bar interconneeting;` the gauge-bar and knife-bar to fix the gauge-bar and knife-bar together for simultaneous movement on the carriage toward and from a record.

1G. In a record-resurfacingr machine, the combination of a mandrel for supporting a record to be resur'faeed; a carriage; a reeord-engaging tool movably mounted on the carriage toward and 'from a record; a gauge mo fably mounted on the carriage to determine the operative position oit the recordengagimj)` tool with relation to the record, said gauge beingl carried by the carriage at one side of the record-engaging tool and being adapted to engage the record--smface when moved to operative position; means securing the gauge with the record-engaging tool in predetermined fixed relation 'lor muituneous movement on the infringe toward and Jl'rom a record; and means for locking `the record-engaging tool and gauge in operative recordeuttinel position.

17. In a recordresurfacing machine, the combination of a mandrel for supportingl a record to be resurfaeed; a carriage; a recordeiig'ziffiligl tool movahly mounted on the earriafaje toward and from a record; a gauge movably mounted on the carriage to determine the operative position of the record engaging tool with relation to the record, said gauge beingl carried by the carriage at one side of the reeordeengaging tool and beim.;l adapted to engage the record-surface When moved to operative position; means securing` the gauge 'with the recordengagingr tool in predetermined tixed relation for simultaneous movement on the carriage torard and l'rom a record; means for lockingv the reeord-engaging tool and gauge in operative cutting` position; and means for rei turningi said reeordengen-ing` tool and gauge 'to inimerative position with relation to the record when said lockingl means is released.

18. In a record-resurfacing machine, the combimtion of a mandrel for suljiporting.; a record to be resurifaeed; a Carriage; a recordenganing tool on the carriage; a gauge associated with said record-engaging tool; manually operable means for setting the recordengaging tool .in predetermined operative cutting; position for taking;r a rst or rough eut; and means autoinaticall;7 operated in response to movement et' the carri a e after the first shaving cut has been made lor movingthe reeordeengagine' tool from said manuell;T set position to advanced position tor taking a finishing' out o'l predetermined depth.

19. In a record-resurfacing machine, the combination ol a mandrel for supporting` a record to be resurfaced; a carriage; a knife; a kni'te-bar on which said knife is mounted; and a knife-har holder movably mounted on the carriage lor movement toward and l'rom the record relative to the carriage, said knife-bar beingl 1n( table relative to the holder.

20. In a reeord-reeuriaeing machine, the combination o'l. a mandrel for supporting a reeord to be reeurtaced; a carriage; a kniite; a imite-bai.' on which said kni'lie is mounted; a knife-har holder movably mounted on the carriage for movement toward and from the record While the carriage is in operative position; and means ttor moving` the knife-bar relative to the kniefbar holder.

21 In a record-1'esurliacing machine, the combination of a mandrel for supporting a record to be resurlfaeed; a carriage; a knife; :i imite-bar on which said knitfe is mounted; a knilebar holder movably mounted on the carriage lfor movement toward and from the record while the carriage is in operative po sition, said knife-har being movable relative to said imite-bar holder and means for movingr the knife-bar holder and knife relative to the carriage.

In a reeord-resurfacing machine, the combination of a mandrel for supportingl a record to be resurfaced; a carriage; a knife; a lzni le-bar on which said knile is mounted; a knife-har holder movabl;7 nlounted on the carriage for movement toward and. from the reeord while the carriage is in operative poeition; means for movingr the knife-bar hold er and knife relative to the carriage; and means for moving the knife-har relative to the holder.

23. In a record-resurfacing machine, the combination oi a mandrel for supporting a record to he resurfaced; a Carriage; a knife; a. knife-bar on which said kni'le mounted; a kni'lfehar holder movahly mounted on the carri: e for movement toward and from the record while the carriage is in operative position; mean for movingthe knife-har holder and knife relative to the carriage; means tor moving the knife-bar relative to the holder; and means t'or lockingrthe knife-bar to the knife-*bar holder for simultaneous movement toward and from the record.

Qfl. In a reeordfresurliaeing machine, the combination oi a mandrel for supporting a record to be resurfaeed; a carriage; a kniie; a knife-bar on which said knite is mounted; a knife-bar holder movably mounted on the carriage for movement toward and from the record while the Carriage in operative position; means for moving the knilebar holder and knit'e relative to the carriage; means for moving the knife-har relative to the holder; means for locking the knife-bar to the knife-bar holder for simultaneous movement toward and from the record; and

Sl (l means for moving the holder step-by-step a predetermined amount upon each operation thereof. A

25. In a record-resurfacing machine7 the combination of a mandrel for supporting a record to be resurfaced; a carriage; a knife; a knife-bar on which the knife is mounted; a knife-bar holder movably mounted on the carriage for movement toward and from the rec-ord While the carriage is in operative position; manually operable means for moving the knife-bar relative to the holder; and automatically operated means for moving the knife-bar holder toward and from the record.

Q6. In a record-resurfacing machine, the combination of a frame; a mandrel on said frame for supporting a record to be resurfaced; a carriage slidably and pivotallv mounted on said frame; a record-engaging tool movably mounted on the carriage; means to yieldingly hold the record-engaging tool in desired position; and means operated by a pivotal movement of the earriage for advancing the record-engaging tool 'relative to the carriage against the action of said yielding holding means.

27. In a record-resurfacing machine, the combination of a frame; a mandrel on said frame for supporting a record to be resurfaeed; a carriage slidably and pivotally mounted on said frame; a record-engaging tool movably mounted on the carriage; a gage interconnected with the record-engaging tool; and a pawl and ratchet mechanism for advancing the record-engaging tool relative to the ca riage one step When the carriage is given a pivotal movement on the frame.

28. In a record-resurfacing machine, the combination of a frame; a mandrel on said frame for supporting a record to be resurfaced; a carriage slidably and pivotally mounted on said frame; a record-engaging tool on the carriage; and means comprising cooperating cam members for advancing the record-engaging member relative to the carriage when the carriage is given a pivotal movement on the frame.

29. In a record-resurfacing machine, the combination of a frame; a mandrel mounted on the frame for supportinga record to be resurfaced; a carriage mounted on the frame for pivotal and sliding movements relative to the frame; a knife; a knife-bar on Which said knife is mounted; a knife-bar holder movably mounted on the carriage for movement toward and from the record relative to the carriage; and a paWl and atchet mechanism for moving the knife-bar holder relative to the carriage to advance its position with relation to the record when the carriage is given a pivotal movement.

30. In a record-resurfacing machine, the

combination of a frame; a mandrel mounted on the frame for sul'iporting a record to he rcsurfaced; a carriage mounted on the frame for pivotal and sliding movements relative to the fanie; a knife; a knife-bar on which said knife is mounten; a knife-bar holder movably mounted on the carriage for movement toward and from the record relative to the carriage; and means comprising cooperating cam members for moving the knife-bar holder to advance it relative to the record when the carriage is given a pivotal movement on said frame.

3l. In a record-resurfacing machine, the combination of a f ame; a mandrel mounted on the frame for supporting a record to be resurfaced; a carriage mounted on the frame for pivotal and sliding movements relative to the frame; a knife; a knife-bar on which said knife is mounted; a knife-bar holder movably mounted on the carriage for movement toward and from the record relativo to the carriage; means comprising camerating cam members for moving the knife-bar holder to advance it relative to the record when the carriage is given a pivotal movement on said frame; and means for returning said cam members and coperating mechanism and moving the knife-bar holder to normal predetermined position relative to the carriage.

In a record-resurfacing machine, the combination of a mandrel mounted for supporting a record to be resurfaced; a carriage; a knife; a knife-bar on which said knife is mounted; a knife-bar holder movably mounted on the carriage for movement toward and from the record relative to the carriage; a. cam mounted on the carriage;

cooperating cam connected to the knifebar holder; and means comprising a pani and ratchet mechanism for moving the lirstnamed cam relative to the second-named cam to advance the knife-bar holder relative te the carriage.

In a record-reenrfacing machine, the combination of a frame; a nmzidrel mounted on the frame for supporting a record to be resin-faced; a carriaggje mounted on the frame for pivotal and sliding movements; a knife; a knife-bar on which said knife is mounted; a knife-bar holder ineimblg,v mounted on the carriage for movement toward and from the record relative to the carriage; a cam mounted on the carriage; :i cooperating cam connected to the knife-bar holder; means comprising a pawl and ratchet mechanism for moving the vtirst-named cam relative to the second-named cam to advance. the knifebar holder `relative to the carriage; and means on the frame for engaging the pawl and ratchet mechanism for operating the same when the carriage is given a pivotal movement.

Cil

3st. In a record-resurfacing machine, the combination of a frame; a mandrel mounted on the frame for supporting a record to be resurfaeed; a carriage pivotally and slidably mounted on said frame; a knife; a knife-bar on which said knife is movably mounted for adjustment relative thereto; a knife-bar holder' movably mounted on the 'farriage for movement toward and from the record relative to the carriage; means for locking the knife-bar to the knife-bar holder in adjusted position; and means for moving the knife-bar, knife-bar holder and knifebar locking means relative to the carriage.

85. In a record-resurfacing machine, the combination of a frame; a mandrel mounted on the frame for supporting a record to be resul-faced; a carriage pivotally and slidably mounted on the frame; a knife; a knife-bar on Which said knife is mounted; a sleeve mounted in the carriage adapted to carry a knife-bar and permit sliding movement of the knife-bar relative thereto, said sleeve being slidably mounted on the earriage; cooperating cam members between the sleeve and the carriage; a paivl and ratchet mechanism for moving one of said cam members relative to the other to advance said sleeve relative to the carriage; and means mounted on the frame for operating said pawl and ratchet mechanism When the carriage is given a. pivotal movement.

3G. In a record-resurfacing machine, the

eonibil'iation of a frame; a mandrel mounted'V on the frame for supporting a record to be resnrfaced; a carriage pivotally and slidably mounted on the frame; a knife; a knifebar on which said knife is mounted; a sleeve mounted in the carriage adapted to carry a knife-bar and permit sliding movement of the knife-bar relative thereto, said sleeve being slidably mounted on the carriage; cooperating cam members between the sleeve and the carriage; a paivl and ratchet mechanism for moving one of said cam members relative to the other to advance said sleeve relative to the carriage; means mounted on the frame for operatinglr said pawl and ratchet mechanism when the farriage is given a pivotal movement; means for locking the knife-bar to the sleeve for simultaneous movement toward and from the carriage; means for releasingr said locking means; and means operated by said releasing means for returning said cam members to normal position and permitting the return of the sleeve to a predetermined position with relation to the carriage.

37. In a record-resurfacing machine, the combination of a frame; a mandrel mounted on the frame for supporting a record to be resurfaced; a carriage pivotally and slidably mounted on the frame; a knife; a knifebar on which said knife is mounted; a sleeve mounted in the carriage adapted to carry a knife-bar and permit sliding movement of the knife-bar relative thereto, said sleeve being slidably mounted on the carriage; cooperating cam members between the sleeve and the carriage; a paivl and ratchet mechanism for moving one of said cam members relative to the other to advance said sleeve relative to the carriage; means mounted on the frame for operating said paWl and ratchet mechanism when the carriage is given a pivotal movement; means for locking the knife-bar to the sleeve for simultaneous movement toward and from the ear-` riage; means for releasing said locking means; means operated by said releasing means for returning said cam members to normal position and permitting the return of the sleeve to apredetermined position with relation to the carriage; an end gate for the mandrel; and means operated by opening movement of the end gate to permit removal of the record from the mandrel for operating said releasing means.

38. In a record-resurfacing machine, the combination of a record to be resurfaced; a record-engaging tool; means for setting the tool in operative position With relation to the record; separately operable finishing eut controlling means; and means operable automatically as an incident to the act of removing a record to return said finishing eut controlling means to ino Jerative position.

3S). In a record-resin' acing machine, the combination of a record to be resul-faced; a set/table record-engaging tool; separately operable finishing-cut `controlling means; and means for automatica]ly cooiiieratively releasing the settable record-engaging tool and the separately operable iinishing cut controlling means incidental to the operation of removing a record from the machine.

Signed at Bridgeport, in the county of liairfield, and State of Connecticut, this 26th day of April, 1927.

JOSEPH M. LUCARELLE. .VICTOR L. FRYKMAN. 

